diff options
Diffstat (limited to 'apt-pkg/pkgcache.cc')
| -rw-r--r-- | apt-pkg/pkgcache.cc | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/apt-pkg/pkgcache.cc b/apt-pkg/pkgcache.cc index 041f0b957..80dd1d1fa 100644 --- a/apt-pkg/pkgcache.cc +++ b/apt-pkg/pkgcache.cc @@ -231,15 +231,16 @@ map_id_t pkgCache::sHash(const char *Str) const return Hash % HeaderP->GetHashTableSize(); } -#if defined(__GNUC__) && defined(__x86_64__) && defined(__ELF__) +#if defined(HAVE_FMV_SSE42_AND_CRC32) -#if defined(__x86_64__) +#ifdef HAVE_FMV_SSE42_AND_CRC32 __attribute__((target("sse4.2"))) static uint32_t hash32(uint32_t crc32, const unsigned char *input, size_t size) { if (input == nullptr) return 0; crc32 ^= 0xffffffffU; +#ifdef HAVE_FMV_SSE42_AND_CRC32DI while (size >= 8) { crc32 = __builtin_ia32_crc32di(crc32, *(uint64_t *)input); input += 8; @@ -247,6 +248,9 @@ __attribute__((target("sse4.2"))) static uint32_t hash32(uint32_t crc32, const u } if (size >= 4) { +#else + while (size >= 4) { +#endif crc32 = __builtin_ia32_crc32si(crc32, *(uint32_t *)input); input += 4; size -= 4; |